Process of making self-locking nuts.



E. R. HIBBARD. PROCESS OF MAKING SELF LOCKING NUTS.

APPLICATION IILED DEO. 21, 1905.

Patented May 24, 1910.

2 SHEETS-SHEET 1.

E. R. HIBBARD.

PROCESS OF MAKING SELF LOCKING NUTS,

APPLICATION IILIBD DBO. 21, 1905.

958,81 Patented May 24, 1910 2 SHEETS-SHEET 2.

iEL.

. CI-DIXGA OAK PARK, IL A HIINGIS, )3 C931 fipylication film?ISr-zcember 21, 1905.

To all whom may concern: slnmin in the drawings, a screw-thread- Be ii k-1 that I, EDW. RU R. Z hmsnnn, nut Mia-11k is prmided with 1 eonczwe acitizen 0:? me Lmted Stain-s, :Qsnhng at in $4.1m 1s prm'nhng mm fan,min a (Mk Pa (301m "V of Cook, and. Nate of deprmsion l pre'ii'emblyextending finitely L q' ilv'linois have imenied n curnm new, nseacrossthe nut. The depression 1 may be if waved irocess for Haki Selfrn' anyWidth. In Fig. 1 if shown less of Wlsuh the E0 is n, in Widil; film}.fin: dizunefiez of the thread- M opennn While in Figs. 5 and 6 itoccum'avmnent relates in a;;1-\ am-@n 1- pies ixnv entire fncv of (henut. in eiflmr ed nuts and nspeciafiy in that iype of nuts (215% aimdepth of n14, depwwsinn is Flight which are pz'ovided with n'wrins $0grip the and :nnonnis in not; re, 2111 preferably bolt n which the nutis mounted and r nsidnrnl1hnlen. than one-half of the pihzh Prat e11551. Anen't neiwean the of Hw'flnc-ml m'i m nut in the diameter of nut21115! Hm bolt hole. "ans opp face of an Tie nn'i' may 3'1: fin'fi :15shown in Fig. l, 01' cm'vedi in (3013M) pond in outline with the face .n

in the first form the nut gm ally (ha (w? in hit-Ear from its m2 .5; Va; opnnsiiio. Fn: of the owning a to "(he xi n un te-r E -(3 u? the n A..in flu! latter "form (i icmg g m inn-k of the nut remains nnifnxm. Tothis my lnvm 3110? m mu is Eu-maxi and flnssnded n5 novel can ctionnndpr show (Ewan-ii ed in pnxs nue, and 31 and mom 5 r F m'fuces, SufiAnna-tethe depresboth faces of the mm 1 and 2, this LEO From the aboveit is to be noted that it is not essential for the depression 1 to beformed in the working face of the nut although in actual practice I havefound it more convenient When so made owing to the usual chamferedcorners and generalform of the other face'of the nut blanks asordinarily made.

In generalroutward appearance my nut correspondsin every way with theusual or ordinary nut and it is obvious therefore that my improvementmay be embodied in any class or form of nut, or nuts employed for anypurpose, or formed of any material and that it is immaterial whether theoutline of the depression be formed by flat planes meeting at a slightangle as shown for example in Fig. 5, or whether the surface be curvedas shown in Figs. 1 and (5.

The Whole invention consists in producing a nut of any preferred formhaving a flat working face if desired, but with threads so curved orformed that While a bolt may be freely engaged with the threads of thenut at eitherof its faces, it will firmly lock upon the bolt whenscrewed down thereon. t A

H aring thus described my intention what I claim as new, and desire tosecure byLetters Patent is 1. The herein described process of forming alock-nut consisting in forming a blank with a depression extendingacross the central portion of the nut threading said blank in the usualmanner and then straightening said blank by compression, whereby all ofthe threads in said nut are permanently distorted from a true helix.

2. The herein described process of forming a lock-nut consisting informing a blank with a depression extending across the central portionof the nut less than one-half the depth of the intended pitch of itsthreads, cutting threads in said blank in the usual manner and thenstraightening said blank by the compression, whereby all of the threadsin said nut are'permanently distorted from a true helix along aplurality of lines extending through said nut.

23. The herein described process of forming a lock nut consisting offorming a blank and cutting the thread therein, and thereaftercompressing a portion of the Walls of said blank longitudinally of thethreaded opening to permanently reduce the pitch of all the threads atsaid compressed portion whereby the threads in said nut are per manentlydistorted from a. true helix.

In testimony whereof, I have hereunto signed my name in the presence oftwo subscribing Witnesses.

EDWVARD R. HIBBARD.

Witnesses: t

Var. A. LAKE J. M. Downer.

